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path: root/drivers/media/video/cx88/cx88-blackbird.c
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Diffstat (limited to 'drivers/media/video/cx88/cx88-blackbird.c')
-rw-r--r--drivers/media/video/cx88/cx88-blackbird.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c
index 078be6319556..d3ae5b4dfca7 100644
--- a/drivers/media/video/cx88/cx88-blackbird.c
+++ b/drivers/media/video/cx88/cx88-blackbird.c
@@ -1078,7 +1078,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
}
}
- if (blackbird_initialize_codec(dev) < 0) {
+ if (!atomic_read(&dev->core->mpeg_users) && blackbird_initialize_codec(dev) < 0) {
if (drv)
drv->request_release(drv);
unlock_kernel();
@@ -1109,6 +1109,8 @@ static int mpeg_open(struct inode *inode, struct file *file)
fh->mpegq.field);
unlock_kernel();
+ atomic_inc(&dev->core->mpeg_users);
+
return 0;
}
@@ -1118,7 +1120,7 @@ static int mpeg_release(struct inode *inode, struct file *file)
struct cx8802_dev *dev = fh->dev;
struct cx8802_driver *drv = NULL;
- if (dev->mpeg_active)
+ if (dev->mpeg_active && atomic_read(&dev->core->mpeg_users) == 1)
blackbird_stop_codec(dev);
cx8802_cancel_buffers(fh->dev);
@@ -1138,6 +1140,8 @@ static int mpeg_release(struct inode *inode, struct file *file)
if (drv)
drv->request_release(drv);
+ atomic_dec(&dev->core->mpeg_users);
+
return 0;
}
@@ -1158,6 +1162,10 @@ static unsigned int
mpeg_poll(struct file *file, struct poll_table_struct *wait)
{
struct cx8802_fh *fh = file->private_data;
+ struct cx8802_dev *dev = fh->dev;
+
+ if (!dev->mpeg_active)
+ blackbird_start_codec(file, fh);
return videobuf_poll_stream(file, &fh->mpegq, wait);
}